magnusandClaude Opus 4.6
7d6ca3911f
Polls self-hosted Frankfurter API hourly for USD-based EUR and DKK exchange rates. Both the WebSocket HTML fragments and the /api/price/latest JSON endpoint now include the currency rates alongside BTC price. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
75 lines
2.4 KiB
Markdown
75 lines
2.4 KiB
Markdown
# btcdata
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Bitcoin data backend — Clojure Kit application. Fetches BTC prices from Binance WebSocket and Kraken HTTP, stores in PostgreSQL, exposes a JSON API with WebSocket price stream.
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## Build & Development Commands
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- `make run` — Start dev server on port 4100
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- `make repl` — Start nREPL
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- `make test` — Run tests
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- `make uberjar` — Build production JAR
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- `docker compose up -d` — Start btcdata container
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## Docker
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Docker runs alongside local dev on different ports and databases:
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| | Local dev | Docker |
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|--|----------------|----------------|
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| **Port** | localhost:4100 | localhost:4101 |
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| **Database** | btcprice | btcprod |
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## REPL Commands
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```clojure
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(dev-prep!) ;; Prepare dev system
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(go) ;; Start system
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(reset) ;; Reload code & restart
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(halt) ;; Stop system
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(reset-db) ;; Drop & re-migrate database
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(migrate) ;; Run pending migrations
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(rollback) ;; Rollback last migration
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(query-fn) ;; Get database query function
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```
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## Architecture
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- **Framework:** Kit (Integrant-based)
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- **Server:** Undertow
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- **Routing:** Reitit
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- **Database:** PostgreSQL + conman + Migratus
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- **Port:** 4100 (env: BTCDATA_PORT)
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- **CORS:** Configured via CORS_ORIGIN env var
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## API Endpoints
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- `GET /api/health` — Health check
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- `GET /api/price/ws` — WebSocket endpoint for live HTML price fragments with EUR/DKK rates (HTMX-compatible)
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- `GET /api/price/latest` — Latest price + EUR/DKK rates as JSON
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## Source Layout
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```
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src/clj/pmagnus/btcdata/
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├── core.clj # App entry point
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├── config.clj # System config loader
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├── ws/
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│ └── binance.clj # Binance WebSocket client
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├── frankfurter/
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│ └── rates.clj # EUR/DKK exchange rate poller
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├── kraken/
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│ ├── ohlc.clj # Hourly OHLC poller
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│ └── ohlc_daily.clj # Daily OHLC poller
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└── web/
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├── handler.clj # Ring handler + routes
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├── controllers/
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│ └── health.clj # Health check
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├── middleware/
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│ ├── core.clj # Base middleware + CORS
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│ ├── exception.clj # Exception handling
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│ └── formats.clj # Content negotiation
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└── routes/
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├── api.clj # /api routes (JSON + WebSocket)
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└── utils.clj # Route utilities
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```
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